Last updated: August 21, 2025
In September, the weather in Chang'an, China, presents a warm and humid climate, with maximum temperatures peaking at a sizzling 36°C (96°F). On average, temperatures hover around a comfortable 26°C (78°F), while nighttime lows can drop to a refreshing 15°C (59°F). This month sees an average precipitation accumulation of 143 mm (5.6 in), with rain falling on about 12 days, contributing to a notable humidity level of 81%. These conditions create a lively atmosphere, ideal for enjoying the region's vibrant autumn foliage while preparing for the seasonal transitions.
In September, Chang'an, China experiences a delightful transition as summer gracefully gives way to autumn. With minimum temperatures averaging around 15°C (59°F) and maximums reaching up to 36°C (96°F), the month offers a pleasant warmth that invites outdoor exploration. The average temperature settles at a comfortable 26°C (78°F), making it one of the more enjoyable times of the year. This gradual cool down from the sweltering heat of August, where highs linger near 39°C (103°F), marks a shift towards milder days and cooler evenings, providing a perfect backdrop for cultural festivities and natural beauty explorations. As the days grow shorter and the air becomes crisp, September stands as an ideal time to experience the rich history and stunning landscapes of this ancient city.
In September, Chang'an experiences a notable shift in its monsoon season, with precipitation amounting to 143 mm (5.6 in) over approximately 12 rainy days. While this figure is lower than the summer peak in June, it still marks a significant contribution to the annual rainfall. The month serves as a transition period; the rainfall provides much-needed moisture for the region's agriculture as it approaches the drier months ahead. This trend reflects a gradual decrease in both rainfall and rainy days moving towards October, which typically only sees 49 mm (1.9 in) over 6 days. As the wettest months cool down, September stands out as a crucial time for replenishing groundwater and preparing for the drier seasons ahead.
In September, Chang'an, China, experiences a moderate drop in humidity, recorded at 81%, down from the sweltering heights of summer. This slight decrease marks a transition from the peak humidity levels of July and August, which hovered around 93% and 91% respectively. The lush, moisture-laden months of late spring and summer give way to a more comfortable environment as autumn approaches. Following September’s dip, October continues this trend with a further slight reduction to 80%, indicating a gradual shift towards drier conditions. Overall, the humidity in Chang'an demonstrates a distinct seasonal pattern, with late summer's humidity peaking before settling into the milder autumn months.
As September rolls into Chang'an, the UV Index reaches a notable 10, categorizing it within the very high exposure bracket. This marks a slight decrease from the intense stretch of summer months, which recorded a peak UV Index of 11, recognized as extreme. With a burn time of only 15 minutes, it's crucial for residents and visitors alike to remain vigilant about sun protection. Overall, the month mirrors the preceding April, suggesting a trend of heightened UV levels during late summer and early fall. To learn more about how to stay safe under the sun, check out the Chang'an UV Index.
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As September arrives in Chang'an, China, the city basks in 243 hours of sunshine, reflecting a slight dip from the sun-drenched peak of 312 hours in August. This month stands as a transition, where the vibrant summer days gracefully give way to the cooler embrace of autumn. From January's meager 142 hours, the trend has been upward as sunshine accumulates through the spring and summer months, peaking in July before beginning its gradual descent. With October estimated to bring 227 hours of light, it’s clear that while September may signal a shift, the tail end of summer still lingers, inviting residents and visitors alike to enjoy the last remnants of warmth before the chill of winter approaches.
September in Chang'an, China, offers a moderate chance of sunny weather, with a pleasant 45% likelihood of sunshine. This month marks a notable improvement compared to the summer, where the chances dip to a mere 15% in July. As the seasons shift, the sunny prospect rises, aligning more closely with the earlier months of the year like January, which stands at 51%. While September might not quite reach the brightest days of December, boasting 65%, it certainly provides a welcome transition towards clearer skies as the year begins to cool. Overall, this mid-autumn month reflects a promising opportunity for outdoor activities and enjoying the fading warmth before winter sets in.
As September arrives in Chang'an, China, the daylight duration begins to subtly shift, offering a blend of summer's lingering glow and autumn's encroaching embrace. With 12 hours of daylight, this month marks a gentle decline from the peak of 14 hours experienced in June. Following a consistent pattern, the daylight hours gradually decrease, with October set to bring an even shorter 11 hours. This trend not only highlights the transition between seasons but also sets the stage for the cozy charm of fall, as days become a touch shorter and evenings begin to cool. Embracing September's brilliant days, Chang’an prepares for the softer light of autumn, inviting its inhabitants to savor the warmth before winter's arrival.
In September, the winds of Chang'an begin to signal the transition into autumn, maintaining a steady average speed of 3.0 m/s (7 mph). This moment follows July's peak gusts of 3.7 m/s (8 mph), which infuse the summer with vibrant energy. As the seasons shift, the winds have a soothing consistency, with 3.0 m/s also recorded in April and October, suggesting a balanced atmospheric rhythm. Lower wind speeds in the heart of summer dissipate in the months leading to autumn, while the more robust breezes of early and late summer provide a dynamic backdrop for the lush landscapes of Chang'an. With a gentle yet persistent whisper, the September winds invite reflection and a sense of renewal as the year begins to wane.
Weather in Chang'an varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Chang'an, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present strikingly contrasting weather conditions. In September, temperatures range from a comfortable minimum of 15°C (59°F) to a scorching maximum of 36°C (96°F), with an average of about 26°C (78°F). The month is characterized by high humidity at 81% and considerable precipitation, totaling 143 mm (5.6 in) over 12 days. In contrast, January experiences much colder temperatures, oscillating from a minimum of -7°C (20°F) to a maximum of 23°C (74°F), with an average of only 6°C (43°F). Precipitation decreases to 74 mm (2.9 in) over 9 days, and the humidity is lower at 70%. For more detailed information, you can check Chang'an weather in January.
September and February present starkly contrasting weather characteristics. In September, temperatures typically range from a minimum of 15°C (59°F) to a maximum of 36°C (96°F), with an average of 26°C (78°F). This month is marked by high humidity levels (81%) and considerable rainfall, averaging 143 mm (5.6 in) spread over approximately 12 days. In contrast, February experiences much cooler temperatures, with a minimum of -4°C (25°F) and an average of 7°C (46°F), peaking at 26°C (79°F). The precipitation is lighter, at 76 mm (3.0 in) across about 9 days, and the humidity is somewhat lower at 73%. For more details on the February weather conditions, check out Chang'an weather in February.
September and March present distinctly different weather patterns. In September, average temperatures range from a mild 15°C (59°F) at night to a hot 36°C (96°F) during the day, with a total precipitation of 143 mm (5.6 in) over 12 days, contributing to a high humidity level of 81%. In contrast, March experiences cooler temperatures, with a minimum of 1°C (34°F) and a maximum of 29°C (84°F), alongside a slightly lower total precipitation of 124 mm (4.9 in) across 14 days, while still maintaining the same humidity at 81%. For a more detailed look at March weather, you can visit Chang'an weather in March.
September and April present contrasting weather patterns. September typically boasts higher temperatures, ranging from a minimum of 15°C (59°F) to a scorching maximum of 36°C (96°F), with an average of 26°C (78°F). In contrast, April's cooler temperatures start at a minimum of 5°C (42°F) and peak at 33°C (92°F), averaging 17°C (64°F). Notably, September experiences more rainfall, with 143 mm (5.6 in) over 12 days, compared to April's 92 mm (3.6 in) across 9 days. Additionally, while both months have high humidity levels, April's average humidity of 87% slightly exceeds September's 81%. For more details, you can check Chang'an weather in April.
September and May exhibit noteworthy contrasts in weather patterns. September generally experiences warmer temperatures, with a minimum of 15°C (59°F) and an average of 26°C (78°F), while May has a cooler minimum of 10°C (50°F) and an average of 22°C (73°F). Notably, both months can reach high temperatures, with September peaking at 36°C (96°F) and May at an even higher 38°C (100°F). Precipitation is relatively similar, with September experiencing 143 mm (5.6 in) and May seeing a bit more at 160 mm (6.3 in), although both months have around 12 days of rainfall. Humidity levels are also higher in May at 87% compared to September’s 81%. For more detailed insights into May's weather, you can check out Chang'an weather in May.
In comparing the weather of September and June, both months exhibit warm temperatures, but with notable differences. September showcases a minimum temperature of 15°C (59°F) and a maximum reaching up to 36°C (96°F), leading to an average of 26°C (78°F). In contrast, June begins slightly warmer with a minimum of 16°C (60°F) and a maximum of 37°C (99°F), also averaging 25°C (78°F).
However, June is significantly wetter, receiving about 332 mm (13.1 in) of rainfall over 16 days, compared to September's 143 mm (5.6 in) over just 12 days. The humidity remains high in both months, but June is slightly more humid at 89%, compared to September's 81%. For more detailed information on June weather patterns, you can visit Chang'an weather in June.
In comparing the weather between September and July, September tends to be somewhat milder with average temperatures ranging from a minimum of 15°C (59°F) to a maximum of 36°C (96°F), compared to July's warmer temperatures that range from a minimum of 21°C (70°F) to a maximum of 40°C (103°F). While September averages out at 26°C (78°F), it also experiences significant humidity at 81%, though it's slightly lower than July's high humidity level of 93%. Precipitation is notably less in September, with 143 mm (5.6 in) over 12 days, compared to July's higher 249 mm (9.8 in) over 15 days. For more detailed insights on July’s climate, you can refer to Chang'an weather in July.
In comparing the weather between August and September, we see notable differences in temperature and precipitation. August tends to be warmer, with minimum temperatures around 18°C (65°F) and an average of 30°C (86°F), reaching a maximum of 39°C (103°F). In contrast, September offers cooler conditions, with minimums of 15°C (59°F) and a reduced average temperature of 26°C (78°F), peaking at 36°C (96°F). Both months experience significant rainfall, but August has slightly higher precipitation at 168 mm (6.6 in) over 13 days compared to September’s 143 mm (5.6 in) across 12 days. Additionally, August maintains higher humidity levels at 91%, while September has a slightly lower humidity of 81%. For more details on August's weather, you can refer to Chang'an weather in August.
September typically experiences warmer temperatures compared to October, with a minimum of 15°C (59°F) and an average high of 36°C (96°F). In contrast, October sees a drop in temperatures, featuring a minimum of 9°C (48°F) and an average high of 34°C (94°F). While September is marked by significantly higher precipitation levels at 143 mm (5.6 in) over 12 days, October brings a much drier climate with only 49 mm (1.9 in) of rain over 6 days, making it noticeably less humid, though still quite muggy at 80%. For more details on October weather, you can visit Chang'an weather in October.
September and November present contrasting weather, highlighting the transition from summer to autumn. In September, temperatures can reach a scorching maximum of 36°C (96°F), with an average of 26°C (78°F), while November sees cooler temperatures ranging from a minimum of 1°C (34°F) to an average of 15°C (59°F) and a maximum of 30°C (87°F). Precipitation also varies significantly; September experiences 143 mm (5.6 in) of rainfall across 12 days, whereas November has only 57 mm (2.2 in) over 9 days. Humidity remains relatively high in both months, with September at 81% and November slightly higher at 82%. For more specific weather details during this time, check out Chang'an weather in November.
In September, the weather is characterized by warm temperatures, with a minimum of 15°C (59°F) and an average high of 36°C (96°F), creating a humid environment with 81% humidity. This month also sees significant rainfall, with 143 mm (5.6 inches) spread over 12 days. In contrast, December brings much cooler weather, with temperatures dropping to a minimum of -4°C (24°F) and an average high of 23°C (73°F). Precipitation decreases to 63 mm (2.5 inches) over 8 days, and humidity slightly lowers to 77%. The shift from the heat and humidity of September to the chill of December is quite striking, making each month distinctly unique. For more details on December weather, you can check Chang'an weather in December.
September in Chang'an is a transitional month, marked by a notable shift from the heat of summer to the cooler embrace of autumn. While temperatures still reach a sweltering maximum of 36°C, the average drops to a more comfortable 26°C, offering a welcome relief. Humidity lingers at 81%, creating a humid subtropical environment, while 143 mm of precipitation over 12 days brings much-needed moisture that nourishes the landscape. These shifts distinguish September’s weather from both the oppressive summer heat and the drier, cooler months ahead, making it a unique time to experience Chang'an's evolving climate. For a comprehensive understanding of the area's conditions, visit Chang'an Climate.